Follow up on the above study which identified a cluster of OCA2# in Tonga community; 11 albinism cases; 5 adults and 1 school girl were interviewed

1/1,000

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Luande et al. (17)

Tanzania/36,977,000

Cross-sectional study. Questionnaire to 350 registered people with albinism in Tanzania Tumor Centre

1/1,400

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Okoro (8)

Nigeria/124,009,000

Cross-sectional study. Questionnaires distributed to people with albinism who came to the hospital; expanded the study to educational, health, religious institutions and markets in East central state; 517 albinism cases

** Although it is a crude estimate, we used the prevalence of the specific population in the study and the total population in the country to extrapolate the absolute number of people with albinism within a country

# OCA2 = Oculocutaneous albinism Type 2 (Tyrosine positive)

+ The absolute number in this case was estimated from a prevalence rate of 1 in 1,515 which was provided by the study's authors

--- The population studied makes it difficult to generalize the prevalence to the entire country. Therefore, the absolute number within the country was not estimated